/**
 * Temporal workflow orchestration integration
 * Provides workflow orchestration capabilities for credential issuance and management
 */

export interface WorkflowConfig {
  namespace?: string;
  address?: string;
  taskQueue?: string;
}

export interface CredentialIssuanceWorkflowInput {
  subjectDid: string;
  credentialType: string[];
  credentialSubject: Record<string, unknown>;
  expirationDate?: Date;
  metadata?: Record<string, unknown>;
}

export interface CredentialIssuanceWorkflowOutput {
  credentialId: string;
  status: 'issued' | 'failed';
  error?: string;
}

/**
 * Temporal workflow client (placeholder for actual Temporal integration)
 * In production, this would use @temporalio/client
 */
export class TemporalWorkflowClient {
  constructor(_config: WorkflowConfig = {}) {
    // Config stored for future use in actual Temporal implementation
    void _config;
  }

  /**
   * Start a credential issuance workflow
   */
  async startCredentialIssuanceWorkflow(
    input: CredentialIssuanceWorkflowInput
  ): Promise<string> {
    // Placeholder: In production, this would use Temporal client
    // const client = new WorkflowClient({ ... });
    // const handle = await client.start(credentialIssuanceWorkflow, { ... });
    // return handle.workflowId;

    console.log('Starting credential issuance workflow:', input);
    return `workflow-${Date.now()}`;
  }

  /**
   * Get workflow status
   */
  async getWorkflowStatus(_workflowId: string): Promise<{
    status: 'running' | 'completed' | 'failed';
    result?: CredentialIssuanceWorkflowOutput;
    error?: string;
  }> {
    // Placeholder: In production, this would query Temporal
    return {
      status: 'running',
    };
  }

  /**
   * Cancel a workflow
   */
  async cancelWorkflow(workflowId: string): Promise<void> {
    // Placeholder: In production, this would cancel via Temporal client
    console.log('Cancelling workflow:', workflowId);
  }
}

/**
 * Get Temporal workflow client instance
 */
let workflowClient: TemporalWorkflowClient | null = null;

export function getTemporalWorkflowClient(config?: WorkflowConfig): TemporalWorkflowClient {
  if (!workflowClient) {
    workflowClient = new TemporalWorkflowClient(config);
  }
  return workflowClient;
}
